Paperboard carton end construction



Jan. 21, 1954 J. E. sUcHoDoLsKl ETAL. 3,118,535

PAPERBOARO CARTON END CONSTRUCTION Filed July 27, 1963.v 3 Sheets-Sheet 1 ...A :willi-'.11 '1111111.11111 QH Q 1 "2 Jan- 21, 1964 .1. E. sucHoDoLsKl ETAL 3,118,585

PAPERBOARD CARTON END CONSTRUCTION Filed July 27, 1961 3 Sheets-Sheet 2 /NVEA/roe s BY WJ Afro/@Mfrs Jan 21, 1964 J. E. sUcHoDoLsKl ETAL 3,118,535

PAPERBOARD CARTON END CONSTRUCTION Filed July 27, 1961 3 Sheets-Sheet 5 Afro/a /vf ys United States Patent O 3,118,585 PAPERBOARD CARTON END CONSTRUCTION John E. Suchodolski and Gene Fehlberg, Modesto, and Wayne W. Lunzman, Anaheim, Calif., assignors to Menasha Corporation, a corporation of Wisconsin Filed `luly 27, 1961, Ser. No. 127,198 3 Claims. (Cl. 229-16) This invention relates to paperboard carton end constructions, and included in the objects of this invention are:

First, to provide a paperboard carton end construction which is provided with wide end lands to facilitate stacking of the cartons, and which is so formed as to have high crushing strength.

Second, to provide a paperboard carton end construction wherein its crushing strength is derived from three l plies of end panels as well as from wedge flaps which reinforce the corners of the carton.

Third, to provide a paperboard carton end construction wherein its crushing strength is increased by dual flaps which reinforce the corners of the carton.

With the above and other objects in view, as may appear hereinafter, reference is directed to the accompanying drawings in which:

FIGURE 1 is a partial sectional View, partial end view of the paperboard carton end construction taken substantially along the line 1 1 of FIGURE 2;

FIGURE 2 is a fragmentary, partial plan, partial sectional view thereof taken substantially along the line 2 2 of FIGURE 1;

FIGURE 3 is a transverse sectional view thereof taken through 3 3 of FIGURE 2;

FIGURE 4 is a fragmentary, longitudinal sectional view thereof taken through 4 4 of FIGURE 3;

FIGURE 5 is a developed view of the completed carton;

FIGURE 6 is a developed view of a modified form of the completed carton having dual corner aps;

FIGURE 7 is an enlarged, fragmentary, sectional view of the assembled modified carton taken through 7 7 of FIGURE 8;

FIGURE 8 is a fragmentary, sectional View thereof taken through 8 8 of FIGURE 7.

Reference is first directed to FIGURES 1 through 5. The carton herein illustrated includes a bottom panel 1 which is foldably connected along one of its longer sides to a side panel 2. The ends of the side panel 2 are foldable adjacent its ends to top side end webs 3, which are in turn joined to a second side panel 4. A foldable attachment strip 5 borders the second side panel 4 and is adapted to be secured to the remaining longer side of the bottom panel 1 by glue or by staples, or by other fastening means. The lateral extremities of the top side end webs 3 are provided with triangular corner gussets 6.

Foldably connected to each top side end web 3, between the gussets 6, is an inner end panel 7, which folds downward to the bottom panel 1 and is provided at its lower end with a bottom strip 3 which overlies the bottom panel 1.

Foldably connected to each end of the bottom panel 1 is an intermediate end panel 9 which extends upwardly to the corresponding top side end web 3. Foldably connected to the outer edge of each top side end web 3 is an outer end panel 10 which extends downwardly outside of and contiguous to the corresponding end panel 9.

Foldably connected to the lateral ends of the outer end panels 10 are corner reinforcing flaps 1.1 dimensioned to fit between the corner gussets 6 and 'bottom panels 1 contiguous to the side panels 2 and 4. The lateral ends of the inner end panel 7 and intermediate end panels 9 ICC clear the side panels 2 and 4 a sufficient distance to per- -mit the reinforcing flaps to be inserted therebetween.

The outer end panels 10 and intermediate end panels 9 are provided with hand slots 12 and 13 which register -with each other. The inner end panel 7 may be provided with ventilation holes 14.

The various end panels may be folded in place in different sequences. One procedure consists in folding the intermediate end panels 9 upwardly, then folding the corner reinforcing tiaps 11 into right angle relation with l the outer end panels 10, then thrusting the reinforcing flaps 11 between the lateral ends of the intermediate end flaps 9 and the side panels 2 and 4, and then folding the inner end panel 7 downward.

It will be observed that the ltop end webs 3 are relatively wide and that the corner gussets 6 extend the width of the end webs so yas to provide a substantial bearing surface. The corner reinforcing flaps 11 wedge between the corner gussets '6 and bottom panel 1 to provide vertical reinforcement for the side panels 2 and 4.

The Vintermediate end panels 9 take the primary compression load between the reinforcing flaps 11. However, after a slight yielding of the carton, the inner end panel 7 and outer end panels 10 assume their share of the compression load.

The inner end panel 7, being spaced from the intermediate Iand outer end panels 9 and 1G, provides space for ones fingers to be inserted through the hand slots 12 and 13 so that it is not necessary when lifting the carton to engage the contents of the crate.

Reference is now directed to FIGURES 6 through 8. The construction here illustrated is in many respects similar to the first described construction. However, the bottom panel 1 is divided midway into two complementary bottom panels 1S and 16 connected by an adhesive-coated connecting strip 17. Also, the intermediate end panels 9 are split to form complementary intermediate end panels 18 and 19 joined by continuations `of the adhesive-coated strip 17. Still further, a second set of reinforcing flaps 20 are joined to the distal ends of the complementary intermediate end panels 18 and 19.

When the modified carton is folded, end fl-aps 11 and 20 coact to reinforce each corner as shown in FIGURES 7 and 8. While the end aps 20 are shown in conjunction with the complementary end aps 18 and 19, it should be understood that the end aps 20 may also be attached to the intermediate end panels 9 of the fir-st described structure.

While particular embodiments of this invention have been shown and described, it is not intended to limit the same to the exact details of the constructions set forth, and it embraces such changes, modifications, and equivalents of the parts and their formation and arrangement as come wit-hin the purview of the kappended claims.

What is claimed is:

1. A paperboard carton end construction forming an integral part of a carton having a bottom panel and side panels, `said end construction comprising: a top web joining the ends of said side panels; an inner end panel folded downward from said top yweb and extending to said bottom panel; a bottom panel engaging ap at the lower end of said inner panel overlying and bearing on said bottom panel; an intermediate end panel folded upwardly from said bottom panel and extending to said top web; an outer end panel folded downward from said web and extending to said bottom panel; and a pair of corner reinforcing lflaps foldably attached to said outer end panel at its lateral extremities and disposed Iwithin and contiguous to the end portions of said side panels, said corner reinforcing flaps extending from said top web to said bottom panel; said end panels :and said corner reinforcing ilaps cooper- Patented Jan. 21, 1964 3 ating to resist crushing loads applied `between said top web and bottom panel.

2. A paperboard carton end construction as set forth in claim 1, wherein: said intermediate and outer end panels lie substantially contiguous to each other Aand are provided with mating hand slots, said inner end panel being spaced inwardly therefrom la distance to acomrnodate a persons ngers therebetween.v

3. A paperboard carton end construction `forming an integral part of a carton having a 4bottom panel and side panels, said end Iconstruction comprising: a top web joining the ends of said side panels; an inner end panel folded downward from said top web and extending to and bearing on said bot-tom panel; an intermediate end panel folded upwardly ,from said bottom panel and extending to said top web; an outer end panel folded downward from said web and extending to said bottom panel; a first pair of corner reinforcing flaps foldably attached to said outer end panel at its lateral extremities; a second pair of corner reinforcing flaps foldably attached to said intermediate end panel at its lateral extremities; said corner reinforcing aps `being folded within and contiguous to the end portions of said side panels and extending between said top web and said bottom panel to cooperate with said end panels -to .resist crushing loads applied to said carton.

References Cited in the file of this patent UNTED STATES PATENTS 2,593,143 Hendrick Apr. 15, 1952 2,791,366 Geisler May 7,V 1957 3,017,064 Davis Jan. 16, Y1962 3,055,572 Crane Sept. 25, 1962 

1. A PAPERBOARD CARTON END CONSTRUCTION FORMING AN INTEGRAL PART OF A CARTON HAVING A BOTTOM PANEL AND SIDE PANELS, SAID END CONSTRUCTION COMPRISING: A TOP WEB JOINING THE ENDS OF SAID SIDE PANELS; AN INNER END PANEL FOLDED DOWNWARD FROM SAID TOP WEB AND EXTENDING TO SAID BOTTOM PANEL; A BOTTOM PANEL ENGAGING FLAP AT THE LOWER END OF SAID INNER PANEL OVERLYING AND BEARING ON SAID BOTTOM PANEL; AN INTERMEDIATE END PANEL FOLDED UPWARDLY FROM SAID BOTTOM PANEL AND EXTENDING TO SAID TOP WEB; AN OUTER END PANEL FOLDED DOWNWARD FROM SAID WEB AND EXTENDING TO SAID BOTTOM PANEL; AND A PAIR OF CORNER REINFORCING FLAPS FOLDABLY ATTACHED TO SAID OUTER END PANEL AT ITS LATERAL EXTREMITIES AND DISPOSED WITHIN AND CONTIGUOUS TO THE END PORTIONS OF SAID SIDE PANELS, SAID CORNER REINFORCING FLAPS EXTENDING FROM SAID TOP WEB TO SAID BOTTOM PANEL; SAID END PANELS AND SAID CORNER REINFORCING FLAPS COOPERATING TO RESIST CRUSHING LOADS APPLIED BETWEEN SAID TOP WEB AND BOTTOM PANEL. 